What is the maximum slope for a ramp used as a means of egress without an egress door?

The maximum slope for a ramp used as a means of egress without an egress door is defined by accessibility standards, including the International Building Code (IBC) and the Americans with Disabilities Act (ADA) guidelines. A ramp slope of 1 unit vertical in 8 units horizontal achieves a gradient that is manageable for individuals with mobility impairments, ensuring safer access and reducing fatigue when using the ramp. This ratio translates to a slope of 12.5%.

A slope steeper than this can create challenges in navigation, increase the risk of slips or falls, and may not comply with legal accessibility requirements. Therefore, a slope of 1:8 is designed to balance safety and functionality, making it the appropriate choice for ramps that serve as means of egress in situations where no egress door is present.